Interface Investigation in Nanostructured BaTiO3/Silica Composite Ceramics

Silica-coated ferroelectric particles are promising building blocks for functional bulk composites such as dielectric resonators, supercapacitors, or multiferroics. The ferroelectric/silica interface was fully investigated by means of high-temperature in situ X-ray diffraction, high-resolution scanning electron microscopy, and X-ray photoelectron spectroscopy. Mechanisms occurring at the interface were visualized using high-resolution postmortem and in situ transmission electron microscopy performed at different temperatures. On the light of this interface investigation, we have used advanced sintering processes such as spark plasma sintering and microwave sintering to obtain nanostructured composite ceramics and to evaluate their dielectric properties.

[1]  H. Langhammer,et al.  Investigations on the liquid phase in barium titanate ceramics with silica additives , 2001 .

[2]  F. Weill,et al.  Ferroelectric-Based Nanocomposites: Toward Multifunctional Materials , 2007 .

[3]  R. Raj,et al.  Effect of the Heating Rate on the Relative Rates of Sintering and Crystallization in Glass , 1989 .

[4]  Yen Wei,et al.  Silica coating on barium titanate particles , 1995 .

[5]  G. A. Schurr,et al.  Engineered Particle Surfaces , 1998 .

[6]  E. Matijević,et al.  Preparation, characterization, and sinterability of well-defined silica/yttria powders , 1994 .

[7]  N. Labhsetwar,et al.  Synthesis and Magnetic Characterization of Zinc Ferrite Nanoparticles with Different Environments: Powder, Colloidal Solution, and Zinc Ferrite−Silica Core−Shell Nanoparticles , 2002 .

[8]  G. Schneider,et al.  Preparation of BaTiO3 single crystals using the modified SiO2-exaggerated grain growth method , 2002 .

[9]  P. Dawson,et al.  Simulation of the Viscous Sintering of Two Particles , 1990 .

[10]  C. Elissalde,et al.  Controlled growth of silica shell on Ba0.6Sr0.4TiO3 nanoparticles used As precursors of ferroelectric composites , 2005 .

[11]  Seong‐Hyeon Hong,et al.  Coating BaTiO3 Nanolayers on Spherical Ni Powders for Multilayer Ceramic Capacitors , 2003 .

[12]  C. Elissalde,et al.  Controlling internal barrier in low loss BaTiO3 supercapacitors , 2009 .

[13]  L. Liz‐Marzán,et al.  The Assembly of Coated Nanocrystals , 2003 .

[14]  T. Tseng,et al.  Preparation of SiO2 Glass from Model Powder Compacts: II, Sintering , 1984 .

[15]  Frank Caruso,et al.  Nanoengineering of particle surfaces. , 2001 .

[16]  T. Tseng,et al.  Preparation of SiO2 Glass from Model Powder Compacts: I, Formation and Characterization of Powders, Suspensions, and Green Compacts , 1984 .

[17]  L. T. Zhuravlev.  The surface chemistry of amorphous silica. Zhuravlev model , 2000 .

[18]  S. George,et al.  Nanoparticle Coating for Advanced Optical, Mechanical and Rheological Properties , 2007 .

[19]  C. Choy,et al.  Core-shell structure of nanoscaled Ba0.5Sr0.5TiO3 self-wrapped by MgO derived from a direct solution synthesis at room temperature , 2004 .

[20]  Longtu Li,et al.  Structure, sintering behavior and dielectric properties of silica-coated BaTiO3 , 2002 .

[21]  T. Ring,et al.  Stabilization and Processing of Aqueous BaTiO3 Suspension with Polyacrylic Acid , 1992 .

[22]  S. Abrahams,et al.  Fresnoite: A new ferroelectric mineral , 1999 .

[23]  M. Sacks,et al.  Fabrication of Mullite and Mullite-Matrix Composites by Transient Viscous Sintering of Composite Powders , 1991 .

[24]  K. Koumoto,et al.  Microstructure-Controlled Deposition of SrTiO3 Thin Film on Self-Assembled Monolayers in an Aqueous Solution of (NH4)2TiF6−Sr(NO3)2−H3BO3 , 2003 .

[25]  H. Abicht,et al.  Preparation, characterization and sintering behavior of barium titanate powders coated with Ba-, Ca-, Si- and Ti-containing components , 1997 .

[26]  S. Marinel,et al.  A New Inductive Furnace Based on Microwave Irradiation for Growing Long YBa2Cu3O7–δ Single‐Domain Bars , 1998 .

[27]  Z. J. Zhang,et al.  Synthesis and magnetic characterization of Mn and Co spinel ferrite-silica nanoparticles with tunable magnetic core , 2003 .

[28]  E. Giannelis,et al.  EFFECT OF HEATING RATE ON THE SINTERING OF TITANIUM-DIOXIDE THIN-FILMS - COMPETITION BETWEEN DENSIFICATION AND CRYSTALLIZATION , 1991 .

[29]  Bénédicte Lebeau,et al.  Chemical strategies to design textured materials: from microporous and mesoporous oxides to nanonetworks and hierarchical structures. , 2002, Chemical reviews.

[30]  H. Abicht,et al.  The influence of different additives and the mode of their addition on the sintering behavior and the properties of semiconducting barium titanate ceramics , 1998 .

[31]  Florencio Garcia-Santamaria,et al.  Synthetic Opals Based on Silica-Coated Gold Nanoparticles , 2002 .